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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The maximum steam pressure in a Locomotive boiler is limited to

18 MN/m²
180 MN/m²
1.8 MN/m²
0.18 MN/m²

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Steam Boilers, Engines, Nozzles and Turbines
The actual power generated in the engine cylinder is called

Frictional power
None of these
Brake power
Indicated power

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Steam Boilers, Engines, Nozzles and Turbines
The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity ‘V’ at inlet)

Vb = V² cos α
Vb = V cos α
Vb = 0.5 V cosα
Vb = 0.5 V² cosα

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Steam Boilers, Engines, Nozzles and Turbines
Reheating of steam in a turbine

All of these
Increases the work-done through the turbine
Increases the efficiency of the turbine
Reduces wear on the blades

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Steam Boilers, Engines, Nozzles and Turbines
A condenser in a steam power plant

Increases expansion ratio of steam
Reduces temperature of exhaust steam
Reduces back pressure of steam
All of these

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Steam Boilers, Engines, Nozzles and Turbines
An air preheater

Increases the efficiency of the boiler
Enables low grade fuel to be burnt
All of these
Increases evaporative capacity of the boiler

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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